Chromatic Smite

The next time you hit with a melee weapon attack during this spell’s duration, your attack deals an extra 3d8 elemental damage. You choose acid, cold, fire, lightning, poison, or thunder for the type elemental damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.